CVE-2021-30027

5.5 mediumEPSS 0.7%

Medium (5.5) in md4c project md4c. EPSS 0.7% chance of exploitation in the next 30 days.

md_analyze_line in md4c.c in md4c 0.4.7 allows attackers to trigger use of uninitialized memory, and cause a denial of service via a malformed Markdown document.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-908
Published: 2021-04-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

md4c_project:md4c

References

https://github.com/mity/md4c/commit/4fc808d8fe8d8904f8525bb4231d854f45e23a19
https://github.com/mity/md4c/issues/155
https://github.com/mity/md4c/commit/4fc808d8fe8d8904f8525bb4231d854f45e23a19
https://github.com/mity/md4c/issues/155

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